**What did you do?** **What did you expect to see?** **What did you see instead? Under which circumstances?** **Environment** * System information: insert output of `uname -srm` here * Alertmanager version: insert output of `alertmanager --version` here (repeat for each alertmanager version in your cluster, if relevant to the issue) * Prometheus version: insert output of `prometheus --version` here (repeat for each prometheus version in your cluster, if relevant to the issue) * Alertmanager configuration file: ``` insert configuration here ``` * Prometheus configuration file: ``` insert configuration here (if relevant to the issue) ``` * Logs: ``` insert Prometheus and Alertmanager logs relevant to the issue here ```